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Recent South Africa 10 And 20 Cent Oddities

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Valued Member

United States
60 Posts
 Posted 05/03/2013  7:43 pm Show Profile   Bookmark this topic Add thebugguy to your friends list Get a Link to this Message Number of Subscribers
Howdy.

I thought folks might be interested in a couple of recent South African coins I have with rather major defects. The first is a 1990 10 cent coin with odd "craters" with raised edges on both sides- I'm not sure what die or flan defect would cause this.

The second is a 1992 20 cent coin with a normal obverse but a rather large Cud (I believe) on the reverse. Neat!


Recent-South-Africa-10-And-20-Cent-Oddities

Recent-South-Africa-10-And-20-Cent-Oddities

Recent-South-Africa-10-And-20-Cent-Oddities

Recent-South-Africa-10-And-20-Cent-Oddities

cheers,
tbg
Valued Member
United Kingdom
152 Posts
 Posted 05/04/2013  07:11 am  Show Profile   Bookmark this reply Add numismatic biz to your friends list Get a Link to this Reply
On your 1st coin itlooks like a piece of metal was on the die before the flan/planchet was place then struck.

Is it iron as it does look rusty

Yours

michael
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DVCollector's Avatar
United States
10045 Posts
 Posted 05/04/2013  2:55 pm  Show Profile   Bookmark this reply Add DVCollector to your friends list Get a Link to this Reply
I'm not sure the first coin was struck that way, since the raised areas would conflict with the surface of the die.
Your second coin looks like a very nice Cud.
Valued Member
United States
60 Posts
 Posted 05/04/2013  11:10 pm  Show Profile   Bookmark this reply Add thebugguy to your friends list Get a Link to this Reply
Thanks for the comments!

I'm still not sure what happened with the first coin, whether it was a damaged set of dies or post-production damage to the coin itself. I put it under the scope and had a closer look- the "craters" (for lack of a better term) have differing and irregular edges- not something you'd expect if someone stabbed the thing with an ice-pick, knife-point, die punch or the like. Besides, I wouldn't expect as much displaced metal from that kind of strike (look at how thick the edges are on the "pinprick" crater on the reverse- would a stab from a very sharp object really do that?). It obviously wasn't run over by a car (we all know what that looks like), and the edges of the craters are worn approximately the same amount as the rest of the coin, indicating that if the coin wasn't produced like this it was damaged shortly thereafter. The craters are filled with crud, but that could easily have happened any time during the coin's life.

On the other hand, I still can't picture what could have happened to the dies to produce this effect, unless it was some gouge in the die that was subsequently filled with a chunk of metal harder than the planchet. Still doesn't make much sense...

Anyway, thanks again for having a look!

cheers,
tbg
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Sap's Avatar
Australia
16827 Posts
 Posted 05/05/2013  07:01 am  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
These coins are made of plated steel. For your first coin, I suspect that "bubbles" of rust have formed underneath the plating, due to pinhole flaws in the plating letting water through. The bubbles then burst, showing the rust underneath.

Such craters are commonly seen on American cents, which are made of plated zinc and corrode in a similar fashion.
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enworb's Avatar
Australia
4411 Posts
 Posted 05/05/2013  07:25 am  Show Profile   Bookmark this reply Add enworb to your friends list Get a Link to this Reply
Thats a great Cud on the second coin! A definite keeper!
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